首页
登录
职称英语
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i
游客
2025-02-23
17
管理
问题
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes is 10 more than twice the number of quarters, what is the total value of the coins.
选项
A、$9
B、$2.5
C、$3
D、$5.5
E、$12
答案
D
解析
dimes指10美分硬币,quarter指25美分硬币,假设quarters的数目为x,那么dimes的数目便是2x+10,根据题意有:x+2x+10=40,得到x=10,因此硬币总价值是30×0.1+10×0.25=5.5(美元)。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3969535.html
相关试题推荐
数列按照1,2,2,3,3,3,4,4,4,4,5,…的规律一直排下去,whichofthefollowingisthe100thnumber?A
Selectonenumberfromtheset{0,1,2,3,4,5,6,7,8,9},takedownitsval
WhichofthefollowingnumbersisNOTthesumofthreeconsecutiveoddintegers?
QuantityA:thestandarddeviationoftheoddnumbersbetween1and19inclusive
Onaroadthereisatreeevery46meters.Ifthetreesarenumberedconsecutive
When-ofacertainnumberissubtractedfromthenumberandthenthisdifferenc
Forallrealnumbersx,theoperationx*isdefinedbytheequationx*=x+4,If(
Rollinganumbercubewithfacesnumbered1to6(similartoa6-sideddie)isa
Sixdifferentnumbersaretobeselectedfromthe(0,1,2,3,4,5,6)tocompos
Thenumbers3,10,17,24,31and38arethefirstsixtermsofaninfinitesequ
随机试题
Goodmorning,ladiesandgentlemen.ItiswithagreatpleasurethatIwelco
Thepatternofinjuriesisconsistent______anattackwithaknife.A、ofB、with
下列关于斗拱的陈述中正确的是( )。A.斗拱是中国古代建筑的特征 B.斗拱的
Caplan综合征是指:A.类风湿结节的另一类型是类风湿尘肺 B.类风湿关
端午节
Thechangeinthatvillagewasmiraculou
肾结核早期最重要的阳性发现是A.静脉肾盂造影有破坏性病灶 B.大量血尿和脓尿
肺心病患者出现代谢性碱中毒的主要原因是( )。A.过度通气 B.尿中酸性物质
基本分析法是仅从证券的市场行为来分析证券价格未来变化趋势的方法。()
下列有关其他信息的说法中,错误的是()。A.其他信息包括已审计财务报表和审计报
最新回复
(
0
)